Type-writing machine.



M. B. SARGENT ks; A. E. KARLBERG.

' TYPE WRITING MACHINE. APPLICATION FILED SEPT. 9, 1913.

Patentgda 26, 1914.

I INVENTORS 7% l3 q/ W Allnrnr UNITED STATES PATENT oFrIcE.

MARSHAL B. sanennr AND Aavxn E. mnrnm, or OWENSBORO, KE TUCKY.

. TYPE-WRTTING MACHINE.

Specification of Letters Patent.

Patented May 26, 1914.

Application filed September 9,1913. Serial No. 788,900.

To all whom it may concern Be it known that we, MARSHALL B. SAR

ennr and Anvm E. KAnLBnRe, of ()wensboro in the county of Daviess andState of Kentucky, have invented certain new and useful Improvements inType-Writing Machines;

use the same.

This invention relates to improvements in typcwriting machines and moreparticularly to paper feeding mechanism therefor,-the

object ofthe invention to provide simple and eiiicicnt means especiallyadaptable for use with a stenographic writing machine, for accuratelymoving the paper step-bystep for line feeding during successivemanipulations of the key levers. \Vith this object in'view, theinvention consists in certain novel features of construction andcombinations of parts as hereinafter set forth and pointed out in theclaims.

In the accompanying drawings, Figure 1 is a sectional view of astenographic typewriting machine showing an embodimentof .our invention.Fig. 2 is a perspective view of a portion of the machine showingthepaper feeding devices and their cooperative relation to other parts, andFigs. 3 and 4 are detail views.

1 represents the frame of the machine, wherein is pivotally mounted aplurality. of key-levers 2 provided respectively with keys or buttons 3and with upwardly projecting rms t. A slotted type bar or comb 5 isdisposed'transvcrsely in the upper portion of the framework and in thisslotted comb, type bars-G arepivotally supported between their ends andeach provided at its upper end with a type 7 ,-the lower ends of saidtype bars beingpivotally connected with the upper ends of the key-leverarms 4. The top of the casing is made with an opening 8, over the backend of which a yoke 9 is located,

said yoke being provided at its ends with vertically disposed, forwardlyprojecting arms 10 located at respective sides of the opening 8 in thecasing top, andfrom these arms], lateral arms 11 project under the topof the frame or casing 1, to which latter they are rigidly secured.

To the forward yoke 9,. links 12 are hinged and aresupported" at theirforward ends by the frame or ends of the arms 10 ofcasing 1. A platenbar 13 (provided with a ylelding strip or platen let) is disposed be--tween and supported by the forward ends of the links 12,-said platen barbeing thus located transversely over the central portion 1 of theframework directly in line with the typeand an inking ribbon and a paperstrip are caused to pass between said type and the platen. The paperstrip 15 is si'pplied from a roll 16 and, after passing in front of theplaten, is passed over a. roller 17 mounted between posts 17 rising fromthe ends of the platen frame. From the roller 17 the paper strip ispassed downwardly and in front of a tension roller 17 b disposed belowthe roller 17. The journals ofthe roller 17 b are mounted in horizontalslots 17 in the posts 17 ,and springs 17f bearing against said journalsserve to press the tension roller forwardly against the paper. From thetension roller, the paper strip passes to the paper feed mechanism,which will be hereinafter described in detail. The spring-pressed roller17 serves to keep the paper strip taut in front of the'feed devices, andinsures the regular and even spacing movements of the looseportion ofthe strip which passes in front of the platen and over the upper roller17, eachtime a key is struck.

A hollow rock-shaft 18 is pivotally mounted upon a stationary or'centershaft between the forwardly projecting arms 10 of the yoke 9. Thisrock-shaft is provided at its ends with upwardly projecting rigid arms19 having bosses 20 at their upper ends, to which are secured,horizontally disposed screws or mountings 20 for spriugpressed feedfingers 21. These fingers depend from their mountings and are slightlyinclined, their lower ends being provided with biting edges .22 whichnormally rest (when no paper is in the machine) upon the slightly curvedup er surfaces 23 of lugs 24: formed or made rigld with the shaft 18alongside the arms 19. The paper strip passes over the surfaces 23 andunder the biting ends of the fingers 21, so that when the shaft 18 isrocked in a direction to cause the arms 19 to move backwardly, the paperwill be gripped between said-fingers and the surfaces of the' finger 25having a biting lower end disposed over a lug 26,said finger beingslightly inclined and cooperating with the upper surface of thelug 26 ina manner to grip the paper. The spring-actuated finger 25 is mountedbetween ears 27 projecting forwardly and upwardly from the centralportion .of the yoke 9, and the lug 26 projects forwardly from a plate28 secured under the horizontal portion of the yoke 9,

A. recess is formed in the under face of the yoke 9 and in this recess aplate 29'is secured in a manner to be spaced slightly above the plate28,-said plates thus constituting guides for the paper strip as thelatter emerges from the feeding devices. The rear edge of the-upperplate 29 is serrated to provide a severing means for the paper strip. 1

A universal bar 30 is pivotally suspended in the framework in positionto be engaged by the upwardly projecting arms l of thet key-levers andis maintained normally in and returned to its normal position by meansof spring 31. An arm 32 projects rearwardly from the frame of theuniversal bar and is connected, by means of a link 33 with an arm 34.depending from the rockshaft 18 of the paper feed devices,said linkbeing pivotally connectedat itsrespective ends to the arms 32 and 34:.

From the construction and arrangement of parts above described, it willbe seen that each manipulation of a key or keys to effeet the printingoperationof the type, motion will be imparted through the universal barand its connections with the rock-shaft l8, to rock said shaft and causethe paper to be fed as above described, the distance of movement of thepaper at each operation being that which is suitable for line spacing.During the return movement of the key-lever and universalbar, therock-shaft 18 will also return to its normal position, the feed fingers21 riding freely over the paper while the latter is held againstretrograde movement by the gripping action. of" the finger 25 over thelug 26.

Our improvements are quite simple in construction, but they have beenfound to be very effectual in operation, insuring. accurate movement ofthe paper strip without liability of slipping or danger of tearing thepaper.

Slight changes might be made in thedetails of construction, ofourinvention without departing from the spirit thereof or limiting itsscope and hence we do not wish to restrict ourselves to the precisedetails herein set forth.

Having claim as new and desire to secure by Letters-Patent is: v

1. A paper feed mechanism comprising a rock-shaft, spring actuatedfingers carried fully described. our invention what by and movable withsaid shaft, said shaft also provided with means movable therewith andcooperative with said fingers to grip a paper strip and move it whensaid shaft is rocked in one direction, and means mounted on a fixedsupport for gripping the paper strip to prevent retrograde movementthereof during the return of the feed fingers.

2. Paper feed mechanism, comprising a rock-shaft, spring-actuated feedfingers carried by and movable with said rock-shaft, means also movablewith said rock-shaft and cooperative with said fingers to grip the paperand nioveit when the shaft is rocked in one direction, a spring-actuatedfinger supported independently of said shaft, and means also independentof said shaft and cooperative with said last-mentioned finger to grip.the paper andprevent retrograde movement thereof during the returnmovement of the rock-shaft and feed devices carried thereby.

3. In a typewriting machine, the combination with framework, of a rockshaft, spring-pressed feeding fingers carried by the re ck shaft andcooperating with a fixed part of said rock shaft and movable with thelat er, a paper gripping finger carried by the framework, and a partrigid with the frame-work under said last-mentioned finger to cooperatewith the latter to prevent retrograde movement of the paper when therockshaft and feeding fingers move forwardly.

' 4C. In a typewriting machine, the combination with framework, of arock-shaft, paper gripping and feeding means carried by said rockshaft,a yoke rigid with the framework, a lug projecting forwardly from saidyoke, a spring-actuated gripping finger mounted on the yoke and havingits free end disposed over said lug to cooperate therewith andconstitute paper gripping .means to prevent retrograde movement of thepaper,

5. In atypewriting machine, the combination with framework, of arook-shaft, paper gripping and feeding means carried by and movable withsaid rock-shaft, a yoke rigid with the frame-work, a plate secured toand having a part spaced from the lower face of said yoke, a lugprojecting forwardly from said plate, and a spring-actuated finy germounted on the yoke over said lug and oooperative with the latter toconstitute a paper grip to prevent retrograde movement of the paper.

6-. In a. typewriting machine, the combination with keydevcrs, and auniversal bar operable by saidkey-levers, of a rock-shaft,paper-[gripping and feeding means carried by and positively movable inboth directions with said rock-shaft, connections between said universalbar and rock-shaft'for imparting rocking movement to the latter and thepaper gripping and feeding means carare manipulated for effecting line.spacing,

and paper gripping devices: on the framework and operable independentlyof said" rock shaft and the paper gripping and feed .ing means forpreventing retrogrnde movement ofthe paiper durlng return movement- ]ofthe ifeedlng means.

7. In e' typewriting machine, the combinatio'nwith a platen, paperguiding" means,

paper feeding means in rear of said guiding means,- and means :coroperating the feeding means, of a tension roller mounted on theframework .below said guiding means and independently of the feedingmeans, said tension roller having journals, horizontal elongatedhearings in the framework for said journals and springs bearing againstsaid journals and tending to press the tan sio'n roller against thepaper independentlf 20 of end inopposition to the operation of thefeeding means.

In testimony whereof, We have signed this speeifioation in the presenceof two subscribing witnesses.

- 'MARSHALL B. SARGENT.

ARVID E. KARLBERG.

Witnesses:

, J. M. MATTINGLY,

A. R. GRIFFITH.

